1,4-Dioxane
Town of Payson
1,4-Dioxane is a solvent classified by the EPA as a likely human carcinogen. It contaminates groundwater in many states due to industrial wastewater discharges, plastic manufacturing runoff and landfill runoff. Read More.
Animal studies show that 1,4-dioxane can target the liver, kidneys and respiratory system, and that prenatal exposure can harm the developing fetus. The State of California has set a Public Heatlh Goal of no more than 1 part per billion of 1,4-dioxane in drinking water. The state of Massachusetts sets a legal limit of 0.3 ppb, and New Hampshire's limit is 3 parts per billion. There is no national drinking water standard for this contaminant.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.0699 ppb | 54 | 12 | ND - 0.650 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.35 ppb
The EWG Health Guideline of 0.35 ppb for 1,4-dioxane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-06-02 | 201406030497AM | ND |
| 2014-06-02 | 201406030495AM | ND |
| 2014-06-02 | 201406030508AM | ND |
| 2014-06-02 | 201406030506AM | ND |
| 2014-06-03 | 201406040655AM | ND |
| 2014-06-03 | 201406040424AM | ND |
| 2014-06-03 | 201406040610AM | ND |
| 2014-06-03 | 201406040665AM | ND |
| 2014-06-04 | 201406050170AM | 0.450 ppb |
| 2014-06-04 | 201406050225AM | ND |
| 2014-06-04 | 201406050221AM | ND |
| 2014-06-04 | 201406050210AM | ND |
| 2014-06-09 | 201406100337AM | 0.570 ppb |
| 2014-06-09 | 201406100339AM | 0.140 ppb |
| 2014-06-09 | 201406100392AM | ND |
| 2014-06-09 | 201406100043AM | 0.490 ppb |
| 2014-06-16 | 201406170314AM | ND |
| 2014-06-16 | 201406170309AM | ND |
| 2014-06-16 | 201406170275AM | ND |
| 2014-06-16 | 201406170306AM | ND |
| 2014-06-17 | 201406180504AM | 0.0820 ppb |
| 2014-06-17 | 201406180562AM | ND |
| 2014-06-17 | 201406180470AM | ND |
| 2014-06-18 | 201406190432AM | 0.0700 ppb |
| 2014-06-18 | 201406190440AM | 0.0850 ppb |
| 2014-06-18 | 201406190411AM | ND |
| 2014-06-18 | 201406190405AM | ND |
| 2014-12-03 | 201412040562AM | ND |
| 2014-12-03 | 201412040384AM | ND |
| 2014-12-03 | 201412040501AM | ND |
| 2014-12-03 | 201412040499AM | ND |
| 2014-12-04 | 201412050397AM | ND |
| 2014-12-04 | 201412050490AM | ND |
| 2014-12-08 | 201412100584AM | ND |
| 2014-12-08 | 201412100435AM | ND |
| 2014-12-08 | 201412100809AM | ND |
| 2014-12-08 | 201412110690AM | ND |
| 2014-12-09 | 201412110242AM | ND |
| 2014-12-09 | 201412100847AM | ND |
| 2014-12-09 | 201412100737AM | ND |
| 2014-12-09 | 201412100793AM | ND |
| 2014-12-09 | 201412110340AM | ND |
| 2014-12-10 | 201412110609AM | ND |
| 2014-12-10 | 201412110782AM | 0.650 ppb |
| 2014-12-10 | 201412110614AM | 0.510 ppb |
| 2014-12-10 | 201412110648AM | 0.160 ppb |
| 2014-12-15 | 201412160310AM | ND |
| 2014-12-15 | 201412160729AM | ND |
| 2014-12-15 | 201412160701AM | 0.480 ppb |
| 2014-12-16 | 201412170517AM | ND |
| 2014-12-16 | 201412170429AM | ND |
| 2014-12-16 | 201412170514AM | ND |
| 2014-12-16 | 201412170681AM | ND |
| 2014-12-17 | 201412180510AM | 0.0870 ppb |